This failure means that the node you connected to has not initialized yet, or, that the client failed to connect to the cluster. Can you check the logs and see if it manages to connect successfully (the client) and if the cluster it connects to is up and running?

This failure means that the node you connected to has not initialized
yet, or, that the client failed to connect to the cluster. Can you check
the logs and see if it manages to connect successfully (the client) and if
the cluster it connects to is up and running?